feat(KB-013): complete Step 1 — add step progress component to TaskDetailModal

packages/dashboard/app/styles.css

@@ -1117,6 +1117,79 @@ body {
   font-family: "SF Mono", Monaco, Consolas, monospace;
 }
 
+/* === Step Progress === */
+.detail-step-progress {
+  margin-top: 16px;
+}
+
+.detail-step-progress h4 {
+  font-size: 12px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  color: var(--text-muted);
+  margin-bottom: 8px;
+}
+
+.step-progress-wrapper {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.step-progress-bar {
+  flex: 1;
+  display: flex;
+  gap: 2px;
+  height: 8px;
+}
+
+.step-progress-segment {
+  flex: 1;
+  height: 100%;
+  border-radius: 2px;
+  transition: filter 0.15s ease, transform 0.15s ease;
+  cursor: pointer;
+  position: relative;
+}
+
+.step-progress-segment:hover {
+  filter: brightness(1.2);
+  transform: scaleY(1.1);
+}
+
+.step-progress-segment[data-tooltip]:hover::after {
+  content: attr(data-tooltip);
+  position: absolute;
+  bottom: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  background: var(--surface);
+  color: var(--text);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 4px 8px;
+  font-size: 11px;
+  white-space: nowrap;
+  z-index: 10;
+  pointer-events: none;
+  margin-bottom: 4px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
+}
+
+.step-progress-label {
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-muted);
+  font-family: "SF Mono", Monaco, Consolas, monospace;
+  flex-shrink: 0;
+}
+
+.step-progress-empty {
+  font-size: 13px;
+  color: var(--text-dim);
+  opacity: 0.7;
+}
+
 /* === Activity Timeline === */
 .detail-activity {
   margin-top: 20px;